Lock



E. N. JACOBI LOCK April 1o, 1934.

2 Sheets-Sheet l Filed June l5 1952 5 l T/f iwi/i Jim f ATTORNEY.

April 10, 1934. E, N. JACOBI 1,954,209

LOCK

Filed June 13, 1952 2 Sheets-Sheet 2 INVENTOR.

Zing/"57M L/im/ BY a ATTORNEY.

Patented Apr. 10, 1934 1,954,209

UNITED STATES PATENT OFFICE LOCK Edward N. Jacobi, Milwaukee, Wis., assigner to Briggs & Stratton Corporation, Milwaukee,

is., a corporation of Delaware Application Junev 13, 1932, Serial No. 616,881

22 Claims. (Cl. 70-46) f e This invention relates to locks and more parthe bolt in position to permit the removal of the ticularly to a lock of the type commonly used in cylindei;

automobile switches. Figure 4 is an end view of the lock cylinder It is an object of the present invention to proper se; V Y 5 duce a lock having `a lock cylinder which is re- Figure 5 is a view on the line 5,-5 of Fig. l, 60 movable bodily from the mounting member. parts being shown in cross section to more clearly *Another object of this invention is to provide illustrate structural details;

a lock of the character described, wherein the Figure 6 is a top view of the lock assembly with lock cylinder is removably held assembled with parts broken away and in section and with the V, 0 its mounting member or casing by a novel interlock cylinder projected; 65

engaging connection between the locking bolt and Figure '7 is a perspective View of the lock cylinthe cylinder carried cam for actuating the bolt, der per se; and which interengaging connection snaps into place Figure 8 is a perspective view of the mounting upon the insertion of the cylinder. member per se.

More specically, it is an object of this inven- Referring now more particularly to the accom- 70 tion to provide means for removably holding the panying drawings in which like numerals indilock cylinder in the mounting member, which cate like parts throughout the several views, the means may be released by holding the lock bolt locking cylinder 10 is received in the bore of a in a depressed position and revolving the cylinder mounting member or barrel 11 in which it is backwardly. held against axial movement, but is free to rotate 75 It is also an object of this invention'to provide between locked and unlocked positions. The a novel construction for locks of the sliding cylcylinder 10 and mounting member or barrel 11 inder type in which the energy of an expansion are mounted for simultaneous sliding or axial spring is released upon freeing of the locking bolt movement within a casing 14. i. from its keeper recess, to move the lock cylinder The casing 14 is enclosed within an Vouter shell`80 axially and with it the element being controlled. or cover 15 which extends around the ends there- In this connection it is particularly an object of and is preferably formed of chromium or someV of this invention to provide a lock cylinder of other similar metal readily polished, so as to* such construction that the front end portion expresent a pleasing appearance, especially at that posed to view during the projection of the cylportion thereof which is exposed to View when 85 inder from the mounting member, presents a neat the lock is mounted for use.

finished appearance while at the same time the The manner in which the assembled lock cylinder is so designed as to facilitate manufaccylinder and mounting member are retained inY ture by enabling the tumbler recesses to be cored the casing 14 and the manner in which removal 5 out, and to maintain a short neck on the key. of the lock assembly from the casing may be 96m With the above and other objects in View which eiiected will be described in detail hereinafter. will appear as' the description proceeds, my inven- The mounting member or barrel 11, as best tion resides in the novel construction, combinaillustrated in Figure 8, has its front end portion tion and arrangement of parts substantially as 12 reduced in diameter, with the juncture of the hereinafter described and more .particularly detwo diameters forming a shoulder 13. As is cus-v 95 iined by the appended claims, it being understoodr tomary, the mounting member or barrel has diathat such changes in the precise embodiment of metrically'opposite tumbler receiving grooves 29 the hereindisclosed invention may be made as and 30, the front end portions of which extend` N comerwithin the scope ofthe claims. entirely through the wall thickness of the re- In the accompanying drawings, I have illusduced forward end portion 12. p llf 9 and in which:

trated one complete example of the physical em- The lock cylinder 1U has an enlarged head or bodiment of my invention constructed accordange 22 at its front end of a diameter slightly ing to the best mode I have so far devised for the less than the largest diameter of the mounting practical application of the principles thereof, member or barrel and from this enlarged head or ilange, a skirt 23 extends rearwardly to overlie 105' Figure l is a longitudinal cross section through the adjacent portion of the cylinder proper.

a lock embodying this invention; i The internal diameter of the skirt 23is slightly' Figure 2 is a cross section on the line 2 2 of greater than theoutside diameter of the reduced= Fig. 1, looking in the direction of the arrows; end portion of the mounting member to telescope Figure Bis a view similar to Fig. 2, but showing over the same and permit the lock cylinder to Vbe llo" .A substantial saving in inserted into the mounting member until the extreme front end of the mounting member engages the inner wall oi the head or flange 22. The skirt 23 thus encircles the reduced front end portion l2 of the mounting member or barrel and extends to substantially the shoulder 13.

The length of the skirt 23 is greater than the total sliding axial movement of the lock assembly in the'casing so that the juncture between the cylinder and its mounting member is never eX- posed to view.

The lock cylinder, as is customary has a series of locking tumblers 28 which are yieldably urged to project one end outwardly of the cylinder proper into the tumbler receiving groove 29 when the cylinder is in its locked position.

The tumblers 28 are retractable into the cylinder to free the same for rotation upon the'insertion of a proper key 31 into the cylinder, and to obviate an objectionable long neck on the key 31, it is desirable that the series of tumblers 28 beginV as near the frontend of the lock as possible. Consequently the tumblers must extend forwardly of and beneath the skirt 23.

To avoid-undue complications in the manufacture of the cylinder which is usually a die casting, and to permit the tumbler receiving grooves or recesses to be cored out in the usual manner, the annular skirt 23 is cut away as at 24 in line with the tumbler recesses.

Y Inasmuch as the lock assembly projects from the casing during unlocking a would expose the cut-out portion 24 of the annular skirt 23, the front end of the cylinder is encased ina cap 25 stamped from sheet metal of a thickness such that the outside diameter of thecap is substantially equal to the larger diameterof the mountingv member or barrel 11.

Consequently, when the lock cylinder is assembled with the barrel, the entire unit or lock assembly.- is of substantially the same diameter. Thesheet metal cap 25 is held on lthe front end of the lock cylinder by having its end crimped over the inner end of the annular skirt as at 27. Those portions or" the inner end lof the cap opposite the slots 24 are left uncriniped to avoid the objectionable appearance which would result if it were attempted to crimp the cap at these poma The cap 25 has its outersurface highly polished to present a neat appearance and inasmuch as the cap is of the sam-e diameter as the mounting member or barrel, only one finished member is necessary where two have usually been required. the cost of manufacturing the lock'is thus effected.

The lockcylinder is held assembled with the mounting member or barrel 11 against axial movement by a novel'interengaging connection between the locking bolt 20 and the cam 33 projectingfrom the inner end of the cylinder. This interengagingi connection is disengageable under certain conditions which will be hereinafter more fully described.-

The locking bolt 20 is mounted for transverse sliding` movement with respect to the mounting member within a transverse recess comprisingv a narrow rectangular opening 46 through the wall thickness-of the mounting member or barrel at a point in line'with the tumbler receiving groove 29, and a wider rectangular opening 43 through the wall thickness diametrically opposite the opening'46f'and-in line with the tumbler groove 30.

The main stem 45 of the locking bolt is slidably#v received in the opening 46 and an enlarged distance whichY bifurcated end having spaced prongs 40 and 41 is disposed within the wider opening 43.

Between the prongs 40 and 4l is a projection 49 which centers one end of a spring 50 confined between the bolt and a cup member 18. This cup member is provided with an outstanding flange or rim 52 adapted to retain the cup member assembled in a port 53 in the mounting member or barrel.

The cup proper of the member 13 projects through the port 53 beyond the outer cylindrical surface of the mounting member or barrel 11 into a longitudinal groove 55 in the casing 14 and its cover 15. The engagement of the cup member 1 8 in the longitudinal groove 55 holds the lock assembly against turning in the casing 14 and also limits its linear motion.

When the lock assembly is in its retracted locked position as illustrated in Fig. 1, the main stem 45 of the lock bolt projects its end into an opening 47 formed in the casing 14, thus holding the lock assembly against linear movement until the lock cylinder is turned through the medium of the key to cause the cam 33 to retract the locking bolt against the action of the spring 50, whereupon the lock assembly is freed for linear motion as constrained by the engagement of the cup shaped member 18 in the longitudinal groove 55.

The interengaging connection between the cam 33 and the lock bolt which as stated maintains the lock cylinder assembled with the mounting member will now be described.

The cam 33 is of novel construction and has two hook-like projections 37 and 38. These hooklike projections 37 and 38 overlie the inner face of the bolt at opposite ends of a recess 35 formed in the bolt.

Normally the action of the bolt spring 50 maintains the bolt and cam at such relative positions that the hook-like projections 37 and 38 are operatively engaged with the inner face of the bolt. In predetermined relative positions, which require retraction of the bolt beyond its normal retraction by the cam in unlocking, enough and is of such shape as to permit the simultaneous disengagement of the hooks 37 and 38 from the bolt.

The condition is brought about by the fact that the locking bolt has a rectilinear movement transversely of the mounting member bore in which the lock cylinder turns, with the result that the space between the walls of the recess 35 in the locking bolt and the wall of the mounting member bore increases as the locking bolt is drawn into retracted position. This is best illustrated in Fig. 3.

As there shown, the erative engagement with hook 38 moves out of opthe locking bolt when the cylinder is turned as stated. With the lock ,i

connection between the cam and bolt tc be effected merely by the insertion of the cylinder into the mounting member bore.

The disengagement of the interengaging connection between the lock cylinder cam and the locking bolt in view of the fact that the lock asthe recess 35 is large `tion of said bolt lsembly is enclosed within the casing 14, may be effected only when the lock assembly has been moved axially to its unlocking position at which position the active end of the locking bolt aligns with openings 67 and 68 in the casing 14 and cover 15.

These openings 67 and 68, being of less width than the adjacent end of the bolt, do not permit the bolt to extend therein, but merely alford access to the lock assembly through which a tool such as a screw driver end 20a shown in Fig. 3, may be inserted when the requirement for removal of the lock assembly arises.

The projection of the lock assembly axially from the casing is produced by the action of an expansive spring 61 conned between the innermost end of the casing and a disc slidably received Within the casing 14 and abutting the inner end of the mounting member or barrel 1 1. 'I'he disc 60 has the end of an actuating member or wire 65 secured thereto in any suitable manner as by clamping the end of the wire in a bore 63 by means of a set screw 66 threaded in transversev bore 64. The actuating wire leads to the element to be controlled through an armored cable as is customary.

From the foregoing description taken in connection with the accompanying drawings, it will be readily apparent to one skilled in the art, that this invention affords a novel construction for locks wherein a removable cylinder is desirable; that the interengaging connection between the cylinder and the locking bolt which serves to hold the locking cylinder assembled with the mounting member being located at the inner end of the cylinder and adapted to be engaged by merely snapping the cylinder in position, `has many advantages, and that the construction of the front end of the cylinder which is exposed during the projection of the assembly during unlocking greatly reducesthe cost of finishing and provides an exceptionally neat appearing construction.

What I claim as my invention is:

l. In a lock of the character described, a mounting member, a locking bolt in said mounting member, a lock cylinder mounted in said mounting member, a cam formed on said lock cylinder and engageable with said locking bolt to cause retraction thereof to an unlocked position, and a hook member extending past said bolt and being engaged over a shoulder thereon to maintain the lock cylinder assembled with the mounting member.

2. In a lock of the character described, a mounting member a bolt mounted in said mounting member for movement into and out of locked position, resilient means constantly urging said bolt into locked position, a lock cylinder mounted in said mounting member, a cam including an overhanging projection formed on the inner end of said lock cylinder and adapted to actuate said bolt, said projection extending past the bolt and being engaged over a shoulderl thereon to retain the lock cylinder assembled within said mounting member.

3. In a lock of the character described, a casing having an aperture therein, a mounting mem--` ber in said "casing, a locking bolt carried by said mounting member and projectable therefrom into the aperture in said casing, a lock cylinder mounted for rotation in said mounting member, a cam including an overhanging projection on said lock cylinder, said cam being engageable with a porto actuate the same out of the casing aperture, and 'said projection extending past said bolt and engaging the face of the bolt remote from said lock cylinder to retain the lock cylinder assembled with said mounting member.

4. In a lock of the character described, a casing having an aperture therein, a mounting member in said casing, a locking bolt carried by said mounting member and projectable therefrom into said aperture, a lock cylinder mounted fer rotation in said mounting member, a cam, having an overhanging projection on the lock cylinder engageable with a portion of the bolt to move the bolt out of the casing aperture, said projection extending past the bolt and engaging the face of the bolt remote from the lock der to maintain the lock cylinder assembled Within the mounting member, and means constantly urging the bolt to locked position with the projection engaging over the said face of the bolt.

5. In a lock of the character described, a casing having an aperture therein, a mounting member within the casing, a locking bolt carried by the mounting member and engageable in said aperture when in locked position, a lock cylinder within said mounting member, a cam on said lock cylinder, an overhanging projection on said cam, said projection extending past the bolt and engaging the face of the bolt remote from the lock cylinder to maintain the lock cylinder assembled with the mounting member, and means constantly urging the locking bolt into engagement with the cam to maintain the overhanging projection of said cam engaged with said face of the bolt.

6. In a lock of the character described, a mounting member, a locking bolt mounted in the mounting member and projectable therefrom, a lock cylinder rotatably mounted in the mounting member, a cam formed on the inner face of the lock cylinder, an overhanging projection on the cam, said projection extending past the bolt and being engaged with the face of the bolt remote from the lock cylinder, and means constantly urging the bolt into a locked position with an edge thereof in engagement with said cam and the projection constantly in engagement with said face of the bolt, whereby the lock cylinder is maintained assembled in the mounting member.

7. In a lock of the character described, a casing having an aperture and a slot therein, a

mounting member movable in the casing, a locking bolt carried by the mounting member and engageable in said aperture to hold the mounting member against movement, a guide member carried by the mounting member and engageable in said slot for guiding and limiting the movement of the mounting member, a lock cylinder in the mounting member, a cam formed on said lock cylinder and engageable with a portion of the bolt to actuate the bolt from engagement with the aperture, and an overhanging projection on the cam engageable with the inner face of the bolt to maintain the lock cylinder assembled in the mounting member.

8. In a lock of the character described, a casing having an aperture and a slot therein, a mounting member movable in the casing, a locking bolt mounted in said mounting member and engageable in the aperture to hold the mounting member in a locked position, a guide member carried by themounting member and engagea-ble in said slot for guiding and limiting the movement of the mounting member, a lock cylinder in the mounting member, a cam formed on said lock cylinder and engageable with a portion of the bolt to actuate the bolt from its cylinlocked position, an overlying projection on said cam engageable with the inner face of the bolt to maintain the lock cylinder assembled with the mounting member, and means constantly urging the guide member into protracted position and said bolt into locking position.

9, In a lock of the character described, a casing having an aperture and a slot formed therein, a mounting member movable in the casing, a lock bolt having a recess therein mounted in the mounting member and projecting therefrom to engage the aperture in said casing to retain the mounting member in a locked position, a cupshaped member projecting from the mounting member and engageable in said slot to guide the movement of the mounting member between locked and unlocked positions, a lock cylinder in the mounting member, means to releasably fix said lock cylinder relative to said mounting member including a cam formed on the inner end of the lock cylinder, an overhanging projection to the cam, said cam and said overhanging projection extending through the recess in the bolt, and means constantly urging the bolt to locked position with said overhanging projection engaging the inner surface of the bolt to maintain the lock cylinder assembled with the mounting member.

10. In a lock of the character described, a casing having an aperture and a slot formed therein, a mounting member movable in the casing, a lock bolt having a recess and mounted in the mounting member to project therefrom into engagement with said aperture to retain the mounting member in a locked position, a cup-shaped member projecting from the mounting member and engageable in said slot to guide the movement of the mounting member between locked and unlocked positions, a lock cylinder in the mounting member, means to releasably x the lock cylinder relative to the mounting member including a cam formed on the inner end of the lock cylinder, an overhanging projection on the cam, said cam with said overhanging projection extending through the recess in said bolt, means constantly urging said bolt into locked position with said overhanging projection engaging the inner surface of the bolt to maintain said lock cylinder assembled with the mounting member, and a spring mounted in said cup-shaped member constantly urging said cup-shaped member and said lock bolt into protracted positions whereby the overhanging portion of the cam is maintained on the side of said bolt opposite said lock cylinder to retain the lock cylinder assembled with the mounting member.

11. In a lock of the character described, a mounting member, a lock bolt mounted in the mounting member, said bolt having a cut-away portion on one side thereof cooperating with the wall of said mounting member to form a variable dimensioned recess dependent in size on the position of the bolt in the mounting member, a lock cylinder in the mounting member, an eccentric cam on the lock cylinder including a stem and an overhanging projection on the outer end of said stem, the cam including said projection being projected through the recess with the overhanging projection contacting the face of the bolt remote from the cylinder, and means constantly urging the bolt into a position contacting the stem portion of the cam, whereby the overhanging projection is normally in operative engagement with the said face of the bolt to maintain the lock cylinder assembled in the mounting member.

12. In a lock of the character described, a mounting member, a lock bolt mounted in the mounting member and adapted to releasably maintain the mounting member in a locked position, said bolt having a cut-away portion on one side thereof cooperating with the interior of the mounting member to form a variable sized aperture dependent in size upon the position of the bolt in the mounting member, a lock cylinder in the mounting member, a cam formed on the lock cylinder including a stem and an overhanging projection on said stem, means on said overhanging projection to retract the bolt into unlocked position to permit the passage of the cam through said aperture, and means constantly urging the cam into locked position with the edge of said cutaway portion engaging said stem under said projection whereby the lock cylinder is maintained assembled with said mounting member.

13. In a lock of the character described, a mounting member, a lock bolt mounted in the mounting member and adapted to releasably maintain the mounting member in locked position, said bolt having a cut-away portion on one side thereof cooperating with the interior of said mounting member to form a variable sized aperture dependent in size upon the position of the bolt in the mounting member, a lock cylinder in said mounting member, a cam formed on said lock cylinder including a stern and an overhanging projection on the stem, means on said overhanging projection to retract the bolt past its normal .unlocked position to permit the passage of the cam through said aperture, means constantly urging said cam into locked position with the edge of the cut-away portion engaging the stem under the projection, whereby the lock cylinder is maintained assembled with said mounting member, and means whereby the locking bolt may be held in retracted position independent of the action of the cam to disassemble the lock cylinder from the mounting member.

14. In a lock, a casing, a mounting barrel in the casing, and a lock cylinder mounted within the mounting barrel and a part having a nished surface and completely covering that part of the mounting barrel not covered by the casing.

15. In a lock, a casing, a mounting barrel mounted for linear movement within the casing to project outwardly of the end of the casing, a lock cylinder within the mounting barrel, and an inwardly projecting skirt having a finished outer surface carried by the cylinder and covering the mounting barrel end portion projectable from the casing end.

16. In a lock, a casing, a lock assembly within the casing comprising a mounting barrel and a lock cylinder therein, said lock assembly being projectable from one end of the casing, and a single member having a finished surface encasing the lock assembly portion projectable from the casing.

17. In a lock of the character described, a casing a lock assembly having linear movement within the casing and having a portion projectable from the casing, said lock assembly comprising a mounting barrel and a lock cylinder received therein, and means carried by the lock cylinder and extended rearwardly thereof to overlie the adjacent end portion of the mounting barrel, said means extending rearwardly a distance greater than the total projection of the lock assembly from the casing, whereby the juncture between the lock cylinder and mounting barrel remains covered by the casing during the projection of the lock assembly therefrom.

18. In a lock of the character described, a casing, a lock assembly having linear movement Within the casing and having a portion projectable from the casing, said lock assembly comprising a mounting barrel and a lock cylinder received therein, and means carried by the lock cylinder and extending rearwardly thereof to overlie the adjacent end portion of the mounting barrel, said means extending rearwardly a distance greater than the extent of the projection of the lock assembly from the casing, whereby the juncture between the look cylinder and mounting barrel remains covered by the casing during the projection of the lock assembly therefrom, and said means having its surface exposed to view when the lock assembly is projected from the casing neatly linished.

19. In a lock of the character described, a casing, a lock assembly having linear motion within the casing and projectable from the casing, said lock assembly comprising a mounting barrel and a lock cylinder received in the mounting barrel, the lock cylinder being inserted into the mounting barrel a distance to position the outer end of the mounting barrel closely adjacent the front end of the lock cylinder, a series of key operable locking tumblers carried by the lock cylinder and engageable with a recess in the mounting barrel to restrain the lock cylinder against rotation, said series of locking tumblers beginning substantially in line with the outer end of the mounting barrel to be disposed closely adjacent the front end of the lock cylinder and thus obviate a long neck on the key used to retract the tumblers, and an annular Wall extended from the iront end ofthe lock cylinder to overlie the adjacent front end portion of the mounting barrel and certain of the locking tumblers, said annular wall extending rearwardly a distance greater than the total linear travel of the lock assembly in its projection from the casing so that the juncture between the lock cylinder and mounting barrel remains covered at all times.

20. In a lock of the character described, a casing, a lock assembly having linear motion within the casing and projectable from the casing, said lock assembly comprising a mounting barrel and a lock cylinder received in the mounting barrel, the lock cylinder being inserted into the mounting barrel a distance to position the outer end of the mounting barrel closely adjacent the front end of the lock cylinder, a series of key operable locking tumblers carried by the lock cylinder and engageable with a recess in the mounting barrel to restrain the lock cylinder against rotation, said series of locking tumblers beginning substantially in line with the outer end of the mounting barrel to be disposed closely adjacent the front end of the lock cylinder and thus obviate a long neck on the key used to retract the tumblers, an annular wall extended from the front end of the lock cylinder to overlie the adjacent front end portion of the mounting barrel and certain of the locking tumblers, said annular wall being cut away at its portions overlying the tumblers to facilitate manufacture of the lock cylinder, and a sheet metal cap engaged over the front end portion of the lock cylinder and having a cylindrical Wall extending rearwardly over the annular wall to cover the cut-away portions on the annular wall and afford a neat finished appearance for the entire portion of the lock assembly projected from the casing.

2l. In a lock of the character described, a mounting member, a lock cylinder rotatable therein, a spring pressed locking bolt carried by the mounting member and movable transversely of the axis of the lock cylinder, said spring pressed locking bolt having a recess, a cam on the lock cylinder engageable in the recess to retract the locking bolt, and hook means on the cam engageable with the locking bolt to retain the lock cylinder in the mounting member, said locking bolt recess and the cam being of such relative shapes that the urging means of the bolt normally maintains the hook means engaged with the bolt and disengagement is possible when the bolt and cam are in predetermined relative positions.

22. In a lock, a casing, a mounting barrel in the casing, and a lock cylinder to turn within the mounting barrel and having an externally 1inished inward extension cooperating with the casing to cover the mounting barrel.

EDWARD N. J ACOBI. 

